@article{GroetschelMonmaStoer1992, author = {Martin Gr{\"o}tschel and Clyde Monma and Mechthild Stoer}, title = {Facets for polyhedra arising in the design of communication networks with low-connectivity constraints}, journal = {SIAM Journal on Optimization}, volume = {2}, number = {3}, pages = {474 -- 504}, year = {1992}, }